[SCSI] lpfc 8.2.6 : Multiple discovery fixes
Multiple Discovery Fixes:
- Fix race on discovery due to link events coinciding with vport_delete.
- Use NLP_FABRIC state to filter out switch-based pseudo initiators that
reuse the same WWNs.
- Correct erroneous setting of DID=0 in lpfc_matchdid()
- Correct extra reference count that was in the lookup path for the
remoteid from an unsolicited ELS.
- Correct double-free bug in els abort path.
- Correct FDMI server discovery logic for switch that return a WWN of 0.
- Fix bugs in ndlp mgmt when a node changes address
- Correct bug that did not delete RSCNs for vports upon link transitions
- Fix "0216 Link event during NS query" error which pops up when vports
are swapped to different switch ports.
- Add sanity checks on ndlp structures
- Fix devloss log message to dump WWN correctly
- Hold off mgmt commands that were interferring with discovery mailbox cmds
- Remove unnecessary FC_ESTABLISH_LINK logic.
- Correct some race conditions in the worker thread, resulting in devloss:
- Clear the work_port_events field before handling the work port events
- Clear the deferred ring event before handling a deferred ring event
- Hold the hba lock when waking up the work thread
- Send an acc for the rscn even when we aren't going to handle it
- Fix locking behavior that was not properly protecting the ACTIVE flag,
thus allowing mailbox command order to shift.
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 70255c1..6df8bc0 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -578,14 +578,14 @@
lpfc_cmd->result == IOERR_NO_RESOURCES ||
lpfc_cmd->result == RJT_LOGIN_REQUIRED) {
cmd->result = ScsiResult(DID_REQUEUE, 0);
- break;
- } /* else: fall through */
+ break;
+ } /* else: fall through */
default:
cmd->result = ScsiResult(DID_ERROR, 0);
break;
}
- if ((pnode == NULL )
+ if (!pnode || !NLP_CHK_NODE_ACT(pnode)
|| (pnode->nlp_state != NLP_STE_MAPPED_NODE))
cmd->result = ScsiResult(DID_BUS_BUSY, SAM_STAT_BUSY);
} else {
@@ -626,7 +626,7 @@
if (!result)
lpfc_rampup_queue_depth(vport, sdev);
- if (!result && pnode != NULL &&
+ if (!result && pnode && NLP_CHK_NODE_ACT(pnode) &&
((jiffies - pnode->last_ramp_up_time) >
LPFC_Q_RAMP_UP_INTERVAL * HZ) &&
((jiffies - pnode->last_q_full_time) >
@@ -654,7 +654,8 @@
* Check for queue full. If the lun is reporting queue full, then
* back off the lun queue depth to prevent target overloads.
*/
- if (result == SAM_STAT_TASK_SET_FULL && pnode != NULL) {
+ if (result == SAM_STAT_TASK_SET_FULL && pnode &&
+ NLP_CHK_NODE_ACT(pnode)) {
pnode->last_q_full_time = jiffies;
shost_for_each_device(tmp_sdev, sdev->host) {
@@ -704,6 +705,9 @@
int datadir = scsi_cmnd->sc_data_direction;
char tag[2];
+ if (!pnode || !NLP_CHK_NODE_ACT(pnode))
+ return;
+
lpfc_cmd->fcp_rsp->rspSnsLen = 0;
/* clear task management bits */
lpfc_cmd->fcp_cmnd->fcpCntl2 = 0;
@@ -785,9 +789,9 @@
struct lpfc_rport_data *rdata = lpfc_cmd->rdata;
struct lpfc_nodelist *ndlp = rdata->pnode;
- if ((ndlp == NULL) || (ndlp->nlp_state != NLP_STE_MAPPED_NODE)) {
+ if (!ndlp || !NLP_CHK_NODE_ACT(ndlp) ||
+ ndlp->nlp_state != NLP_STE_MAPPED_NODE)
return 0;
- }
piocbq = &(lpfc_cmd->cur_iocbq);
piocbq->vport = vport;
@@ -842,7 +846,7 @@
struct lpfc_iocbq *iocbqrsp;
int ret;
- if (!rdata->pnode)
+ if (!rdata->pnode || !NLP_CHK_NODE_ACT(rdata->pnode))
return FAILED;
lpfc_cmd->rdata = rdata;
@@ -959,7 +963,7 @@
* Catch race where our node has transitioned, but the
* transport is still transitioning.
*/
- if (!ndlp) {
+ if (!ndlp || !NLP_CHK_NODE_ACT(ndlp)) {
cmnd->result = ScsiResult(DID_BUS_BUSY, 0);
goto out_fail_command;
}
@@ -1146,7 +1150,7 @@
* target is rediscovered or devloss timeout expires.
*/
while (1) {
- if (!pnode)
+ if (!pnode || !NLP_CHK_NODE_ACT(pnode))
goto out;
if (pnode->nlp_state != NLP_STE_MAPPED_NODE) {
@@ -1162,7 +1166,7 @@
goto out;
}
pnode = rdata->pnode;
- if (!pnode)
+ if (!pnode || !NLP_CHK_NODE_ACT(pnode))
goto out;
}
if (pnode->nlp_state == NLP_STE_MAPPED_NODE)